Plumber s fitting



W. BLACKWOOD.

Jan, 23, 1923.

PLUMBERS FITTING.

FILED JUNE 27. 1921.

Fig.1

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WILLIAM BLACKWOOD, OF PONTIAC, MICHIGAN.

PLUMBER/S FITTING.

Application filed June 27,

To cZZ who 1n it may concern:

Be it known that I, WVILLIAM BLAOKWOOD,

a citizen of the United States of America, residing at lrontiac, in thecounty of Oakland and State of Michigan, have invented certain new anduseful Improvements in Plumbers Fittings, of which the followingspecification, reference being had there in to the accompanyingdrawings.

' The drain pipes of bath tubs, wash basins, urinals, sinks and the likeare ordinarily provided with traps or air sealing devices con tainingsmall bodies of water which prevent odors arising in such drain pipes,from the main drain pipes or sewers, from escaping into a bathroom orcompartment. Furthermore, such drain pipes are ordinarily tapped intothe waste pipe of a water closet bowl, between the bowl and the maindrain pipe, and when the water closet bowl is flushed the rush of waterthrough the waste pipe of the closet bowl produces a partial vacuum andpartially, if not completely withdraws the water from, the trap or watersealing devices of the other fixtures in a bath room or closet. As aresult, there is either a gurgling noise or the water is withdrawn fromthe trap allowing gases or obnoxious odors to escape into the bath roomor closet.

My invention aims to provide a plumbing fixture to which drain pipes maybe connected at such a point that it is practically impossible for therush of water through the waste pipe of a closet bowl to produce apartial vacuum in the drain pipe, at least I the reduction ofatmospheric pressure is not sufiicient to completely drain traps orcause a gurgling of water therein.

My plumbing fixture includes a novel form of. elbow or fitting to whicha plurality of waste or drain pipes may be connected, and the fittingmay be straight, angular or curved and still eliminate the gurglingnoise often heard at bath room fixtures when a closet bowl is flushed.

The construction of the fitting will be hereinafter described and thenclaimed, and reference will now be had to the drawing, wherein- Figure 1is a diagrammatic view of toilet fixtures having drain and waste pipesconnected in accordance with my invention, and showing the dash lines inthe usual manner of connecting the drain and waste pipes;

1921. Serial No. 480,564.

Fig. 2 is an enlarged longitudinal sectional view of my fitting, and

Fig. .3 is a plan of a portion of the same.

In order that my invention may be clearly understood, I show a watercloset bowl or hopper 1 connected by a waste elbow pipe 2 to a maindrain or sewer pipe 3. The toilet outfit also includes a bath tub 4 anda wash basin 5, both having traps 6 ordinarily connected by pipes 7 tothe waste pipe 2 at some point below the elbow thereott, but I intend totap these drain pipes into the elbow portion of the waste pipe 2 byproviding a special form of elbow for the waste pipe.

Considering Figs. 2 and 3, the pipe 2 has an elbow 8 provided with anannular chamber 9 formed by an outer annular wall 1.0 and an innerannular wall 11, the wall 11 being concentric of the wall 10 and havingan inturned flange 12 on which is seated the drain pipe or connection 13of the closet bowl 1. The end of the pipe 13 is leaded or fixed to theelbow in the usual and well known manner.

The annular wall 10 of the elbow 8 cooperates with the annular wall 11in inclosing the chamber 9 and the wall 10 is provided with a pluralityof connections 14 to some of which may be connected the drain pipes 7,as shown in Fig. 1, while the other con nections may be plugged oradditional toilet fixtures may be connected to the wall 10. Since thewall 11 is supported from the wall 10 there is necessarily a top wall 15connecting the walls 10 and 11 and the chamber 9 is of sufficient areafor a body of air to remain therein and also within the drain pipe 7 asfar as the traps 6.

It is now apparent that when the closet bowl 1 is flushed there is norush of water across the ends of the pipes 7, as would be the case ifthe pipes were tapped into the waste pipe 2, as shown by dash lines inFig. 1, consequently a partial vacuum is not formed in the drain pipe 7and the sealing water within the trap 6 is not disturbed. It is veryseldom that the waste pipe 2 is completely filled with water and eventhough it should be completely filled it is only momentarily and notsutlicient to disturb the body of air between the waste pipe and thetraps. i

The formation of the chamber 9 within theelbow 8 does not interfere withan installation of the elbow waste pipe in the usual manner, and byproviding theconnections 14 the waste pipe will be standard for thegreatest number of drain pipe connections required for a residencetoilet, and i1 all of the connections let are not used, the unusedconnections are simply plugged and are always in place for any additionsto a toilet, or drain pipes from elsewhere in a residence.

It is thought that the utility of my invention will be apparent withoutfurther description, and while in the drawing there is illustrated apreferred embodiment of my invention, it is to be understood that thestructural elements are susceptible to such changes as fall within thescope of the appended claims.

hat I claim is l. A plumbers fitting comprising a pipe having a chamberin a plane above the axis of said pipe, said chamber having inner andouter walls connected by a top wall in a plane above the pipe, saidinner wall being of less depth than said outer wall and affording a seatfor an adjoining pipe, and the outer wall having connections in a planeabove the bottom of the chamber.

2. In a plumbers fitting by which drain pipes of toilet fixtures areconnected to a main drain pipe, and in which fitting a closet bowldrains ;means for preventing a partial vacuum being produced in saidfitting by the drain of the closet bowl, said means comprising an elbowhaving a chamher by which the toilet fixtures may be connected to theelbow at a point above the drain of the closet bowl therein, saidchamber affording a seat for the closet bowl connection and surroundingsuch connection to have communication with the elbow in a plane belowthe drain pipes from the toilet fixtures.

3. A plumbers fitting as in claim 2, characterized by the chamber ot theelbow having a top wall in a plane above the drain pipe connections withsaid chamber.

In testimony whereof I aflix my signature in presence of two witnesses.

WILLIAM BLACIUVOOD.

\Vitnesses DOROTHY C. IRWIN, ARTHUR V. LADD.

